<template>
    <div class="list" ref="wrapper">
       <div>
            <div  class="area">
<div class="title border-topbottom">当前城市</div>
<div class="button-list">
    <div class="button-wrapper">
        <div class="button">{{this.currentCity}}</div>
    </div>
</div>
        </div>
       <div  class="area">
<div class="title border-topbottom">热门城市</div>
<div class="button-list">
    <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
        <div class="button">{{item.name}}</div>
    </div>
</div>
        </div>
        <div  class="area" v-for="(item,key) of cities" :key="key" :ref="key">
<div class="title border-topbottom">{{key}}</div>
<div class="item-list">
<div class="item border-bottom" v-for="inneritem of item" :key="inneritem.id" @click="handleCityClick(inneritem.name)">{{inneritem.name}}</div>
        </div>
        </div>
       </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      console.log(this.letter)
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';

.border-topbottom {
    &:before {
        border-color: #cccccc;
    }

    &:after {
        border-color: #cccccc;
    }
}
.border-bottom {
    &:before {
        border-color: #cccccc;
    }
}
.list
    overflow hidden
    position  absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    .title {
        line-height: 0.54rem;
        background: #eeeeee;
        padding-left: 0.2rem;
        color: #666666;
        font-size: 0.2rem;
    }
    .button-list {
        overflow: hidden
        padding: 0.1rem 0.6rem 0.1rem 0.1rem
        .button-wrapper {
            float left
            width 33.33%
            .button {
                margin 0.1rem
                padding 0.1rem 0
                text-align center
                border 0.02rem solid #cccccc
                border-radius 0.03rem
            }
        }
    }
    .item-list
       .item
        line-height .76rem
        padding-left 0.2rem
</style>
